Transformer Magnetizing Current

conduct an open circuit test on the transformer.....check out this link for connections and calculations

http://claymore.engineer.gvsu.edu/~johnsodw/egr325mine/paper2/paper2.html

Dear sir,

thank you this one is useful to me

at 11 kv it may be about 0.5A. appears a little on higher side.1)Check with an true rms meter since the mag impedance is highly non linear near the ankle points.2)Check with the mfgr test report.3)If you have a 3ph 30A dimmer very slowly and very carefully increase excitation from 415 v side and try to obtain the mag characteristics stop if you observe a disproportional increase in current after 60v.

Ask Croco

Please refer M.G.Say book- Design and Performance of AC Machines.